Energy-saving device for recovering waste heat of rubber discharging furnace

Abstract

The utility model provides an energy-saving device for waste heat recovery of a rubber discharge furnace, which comprises a plate heat exchanger provided with a first heat exchange channel and a second heat exchange channel, and further comprises an air supply conversion box, a fresh air inlet of the first heat exchange channel is connected with fresh air, a fresh air outlet of the first heat exchange channel is connected with a first inlet of the air supply conversion box, and a second inlet of the air supply conversion box is connected with a second heat exchange channel. The air supply conversion box is further provided with a second inlet for directly introducing fresh air, an air supply outlet and a switching air valve; when the switching air valve moves to the first position, the air supply outlet communicates with the first inlet, and when the switching air valve moves to the second position, the air supply outlet communicates with the second inlet. The switching air valve is used for controlling the first inlet or the second inlet to communicate with the air supply outlet, and when the first inlet communicates with the air supply outlet, fresh air exchanging with waste gas waste heat is fed into the rubber discharging furnace so as to recover heat and save energy. And when the second inlet is communicated with the air supply outlet, fresh air which does not exchange waste heat with the waste gas can be fed into the rubber discharging furnace, so that the rubber discharging furnace can be quickly cooled.

Description

Technical Field

[0001] The utility model relates to the technical field of heat recovery of a debinding furnace, in particular to an energy-saving device for recovering waste heat of a debinding furnace. Background Art

[0002] At present, the commonly used debinding furnace in the processing of passive electronic components (also called passive components) such as capacitors and inductors is a hot air circulation type, which consists of the following parts: air inlet, exhaust port, heating element, air conveying fan, furnace, etc. Its principle is to control the heating element to generate heat through electrical components. The air conveying fan draws fresh air from the air inlet and flows through the surface of the heating element. The air temperature rises to form hot air. The hot air circulates into the furnace through the furnace air duct and flows through the surface of the product to heat the product in the furnace, thereby debinding. The hot air is discharged from the exhaust port after circulation. When the hot air is discharged through the exhaust port, it still takes away a lot of heat. Taking the maximum temperature of the equipment set to 460℃ as an example, the temperature discharged from the exhaust port after the hot air circulation is still as high as 440℃, which requires the heating element of the equipment to continue to output high power for heating, which wastes energy seriously, and the heat from the exhaust port is easily dissipated to the workshop, resulting in high temperature in the workshop working environment and continuous deterioration of the working environment. In addition, the exhaust gas generated during the debinding process circulates in the furnace, affecting the atmosphere of the debinding environment and the debinding effect of the product. In order to avoid energy waste, a heat exchanger is usually installed at the exhaust port of the debinding line to recover the heat carried away by the exhaust gas and preheat the fresh air that will be introduced into the debinding furnace. However, all the fresh air introduced into the debinding furnace by the existing heat exchanger needs to exchange heat with the exhaust gas first. After the debinding furnace is dried, it is necessary to cool down the debinding furnace first. However, the fresh air will be heated after exchanging heat with the waste gas, which causes the cooling speed of the debinding furnace to be relatively slow, affecting the production efficiency. Utility Model Content

[0003] In order to solve the above problems, the purpose of the utility model is to provide an energy-saving device for recovering waste heat from a debinding furnace.

[0004] The utility model is implemented by the following method: an energy-saving device for recovering waste heat from a degumming furnace, comprising a plate heat exchanger, the plate heat exchanger being provided with a first heat exchange channel and a second heat exchange channel which are independent of each other, and also comprising an air supply conversion box, the fresh air inlet of the first heat exchange channel being connected to fresh air, the fresh air outlet of the first heat exchange channel being connected to the first inlet of the air supply conversion box, the air supply conversion box being further provided with a second inlet which directly allows fresh air to pass through, the air supply conversion box being provided with an air supply port, and the air supply conversion box being provided with a switching air valve; the switching air valve being used to switch the air supply port to be connected to the first inlet or to the second inlet, the air supply port being connected to the first inlet when the switching air valve moves to a first position, and the air supply port being connected to the second inlet when the switching air valve moves to a second position; the dirty air inlet of the second heat exchange channel being used to connect dirty air, and the dirty air outlet of the second heat exchange channel being used to discharge dirty air.

[0005] Preferably, the switching air valve includes a driving member and a valve leaf, the valve leaf is rotatably arranged in the air supply conversion box, the first inlet is arranged on one side of the air supply conversion box, the second inlet is arranged on the side of the air supply conversion box opposite to the first inlet, the valve leaf is located between the first inlet and the second inlet, the driving member is transmission-connected to the valve leaf, and is used to drive the valve leaf to move to the first position or the second position, and the air supply outlet is arranged on the frame of the air supply conversion box adjacent to the first inlet and the second inlet.

[0006] Preferably, the valve leaf is rotatably arranged in the air supply conversion box, the driving member is a driving motor, and the output shaft of the driving motor is fixedly connected to the valve leaf for driving the valve leaf to rotate to the first position or the second position.

[0007] Preferably, the output shaft of the driving motor is fixedly connected to the position where the center line of the valve leaf is located, and the air supply outlet is arranged on the lower side of the air supply conversion box. A first connecting line connects the upper end of the side where the first inlet is located and the lower end of the side where the second inlet is located of the air supply conversion box, and a second connecting line connects the lower end of the side where the first inlet is located and the upper end of the side where the second inlet is located of the air supply conversion box. The intersection line formed by the first connecting line and the second connecting line coincides with the center line of the valve leaf.

[0008] Preferably, an X-shaped limit frame is provided between two side surfaces of the air supply conversion box which are adjacent to the first inlet, the second inlet and the air supply outlet, and the X-shaped limit frame is provided with baffles on the upper and lower sides of the side surfaces where the first inlet and the second inlet are arranged close to the air supply conversion box, and the baffles are used to cooperate with the valve leaf and the X-shaped limit frame to seal and isolate the space inside the air supply conversion box.

[0009] Preferably, a dirty air box is provided on the plate heat exchanger, and the dirty air box is located at the dirty air inlet of the second heat exchange channel.

[0010] Preferably, the upper end surface of the dirty air inlet is higher than the bottom surface of the dirty air box, and the dirty air box is further provided with a drain port, the bottom end of the drain port is lower than the upper end surface of the dirty air inlet, and the drain port avoids the dirty air inlet.

[0011] Preferably, a fresh air box is provided on the plate heat exchanger, and the fresh air box is located at the fresh air inlet of the first heat exchange channel.

[0012] Preferably, an exhaust box is provided on the plate heat exchanger, and the exhaust box is located at the dirty air outlet of the second heat exchange channel.

[0013] The beneficial effects of the utility model are as follows: the utility model provides an energy-saving device for waste heat recovery of a debinding furnace. Compared with the prior art, the utility model has at least the following technical effects: 1. By connecting the fresh air outlet of the first heat exchange channel of the plate heat exchanger to the air supply conversion box, and setting a switching air valve in the air supply conversion box to switch the first inlet of the air supply conversion box to the air supply outlet or the second inlet to the air supply outlet, when the first inlet is connected to the air supply outlet, fresh air that exchanges waste heat with the exhaust gas can be sent to the debinding furnace to recover heat and save energy, thereby achieving the purpose of energy saving; when the second inlet is connected to the air supply outlet, fresh air that has not exchanged waste heat with the exhaust gas can be sent to the debinding furnace to achieve rapid cooling of the debinding furnace. 2. Corresponding wind boxes are provided at the fresh air inlet of the first heat exchange channel, the dirty air inlet and the dirty air outlet of the second heat exchange channel, so that there is a cavity from the air inlet to the heat exchanger body, which plays a role in buffering and stabilizing the flow, so that the airflow is more uniform when the inlet or outlet passes through the heat exchanger port. 3. The upper end surface of the dirty air inlet is higher than the bottom surface of the dirty air box and the bottom surface of the drain port, and deviates from the dirty air inlet end surface of the dirty air box on the heat exchanger, which can prevent the waste liquid from flowing back to the debinding furnace. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 The utility model is a three-dimensional structural schematic diagram of an energy-saving device for recovering waste heat from a debinding furnace.

[0015] Figure 2 It is a three-dimensional structural schematic diagram from another perspective of an energy-saving device for recovering waste heat from a debinding furnace according to the utility model.

[0016] Figure 3 The utility model is a cross-sectional schematic diagram of a valve leaf of an energy-saving device for recovering waste heat from a debinding furnace, with the valve leaf in a first position.

[0017] Figure 4It is a partial cross-sectional enlarged schematic diagram of a valve leaf of an energy-saving device for recovering waste heat from a debinding furnace of the utility model being in a first position.

[0018] Figure 5 It is a partial cross-sectional enlarged schematic diagram of a valve leaf of an energy-saving device for recovering waste heat from a debinding furnace of the utility model being in a second position.

[0019] Explanation of the accompanying figures: 1. Plate heat exchanger; 11. Fresh air inlet; 12. Sewage air inlet; 13. Sewage air outlet; 2. Supply air conversion box; 21. First inlet; 22. Second inlet; 23. Supply air outlet; 24. X-shaped limit frame; 25. Baffle; 3. Switching air valve; 31. Driving member; 32. Valve leaf; 4. Sewage air box; 41. Drain port; 5. Fresh air box; 6. Exhaust air box. DETAILED DESCRIPTION

[0020] The utility model is further described below in conjunction with the accompanying drawings and specific embodiments.

[0021] See also Figures 1 to 5 , an energy-saving device for recovering waste heat from a debinding furnace, comprising a plate heat exchanger 1, wherein the plate heat exchanger 1 is provided with a first heat exchange channel and a second heat exchange channel which are independent of each other, and an air supply conversion box 2, wherein a fresh air inlet 11 of the first heat exchange channel is connected to fresh air, and a fresh air outlet of the first heat exchange channel is connected to a first inlet 21 of the air supply conversion box 2, and the air supply conversion box 2 is further provided with a second inlet 22 for directly introducing fresh air, and the air supply conversion box 2 is provided with an air supply port 23, and a switching air valve 3 is provided on the air supply conversion box 2; the switching air valve 3 is used to switch the air supply port 23 to be connected to the first inlet 21 or to the second inlet 22, and when the switching air valve 3 moves to a first position, the air supply port 23 is connected to the first inlet 21 (such as Figure 3 , Figure 4 As shown), when the switch air valve 3 moves to the second position, the air supply port 23 is connected with the second inlet 22 (as shown Figure 5 As shown); the dirty air inlet 12 of the second heat exchange channel is used to receive the dirty air, and the dirty air outlet 13 of the second heat exchange channel is used to discharge the dirty air. By connecting the fresh air outlet of the first heat exchange channel of the plate heat exchanger 1 to the air supply conversion box 2, and setting a switching air valve 3 in the air supply conversion box 2 to switch the first inlet 21 of the air supply conversion box 2 to connect to the air supply port 23 or the second inlet 22 to connect to the air supply port 23, when the first inlet 21 is connected to the air supply port 23, fresh air can be sent to the debinding furnace for waste heat exchange with the exhaust gas to recover heat and save energy; when the second inlet 22 is connected to the air supply port 23, fresh air that has not been exchanged with the exhaust gas for waste heat can be sent to the debinding furnace to achieve rapid cooling of the debinding furnace.

[0022] See also Figures 1 to 4Preferably, the switching air valve 3 includes a driving member 31 and a valve leaf 32, the valve leaf 32 is rotatably arranged in the air supply conversion box 2, the first inlet 21 is arranged on one side of the air supply conversion box 2, the second inlet 22 is arranged on the side of the air supply conversion box 2 opposite to the first inlet 21, the valve leaf 32 is located between the first inlet 21 and the second inlet 22, the driving member 31 is in transmission connection with the valve leaf 32, and is used to drive the valve leaf 32 to move to the first position or the second position, and the air supply port 23 is arranged on the frame of the air supply conversion box 2 adjacent to the first inlet 21 and the second inlet 22. The driving member 31 drives the valve leaf 32 to move to open or close the first inlet 21 and the second inlet 22, which can be to drive the valve leaf 32 to move linearly, move to be in close contact with the first inlet 21 to completely block the first inlet 21, and move to be in close contact with the second inlet 22 to completely block the second inlet 22.

[0023] See also Figures 1 to 5 Preferably, the valve leaf 32 is rotatably disposed in the air supply conversion box 2, the driving member 31 is a driving motor, and the output shaft of the driving motor is fixedly connected to the valve leaf 32, and is used to drive the valve leaf 32 to rotate to the first position or the second position. The valve leaf 32 is rotated, and the driving member 31 only needs one driving motor, which helps to reduce the volume of the waste heat recovery energy-saving device and reduce the equipment procurement cost. The driving member can also be another electric actuator, but is not limited to this.

[0024] See also Figures 1 to 5 Preferably, the output shaft of the driving motor is fixedly connected to the position where the center line of the valve leaf 32 is located, and the air supply outlet 23 is arranged on the lower side of the air supply conversion box 2, a first connecting line connecting the upper end of the side where the first inlet 21 of the air supply conversion box 2 is located and the lower end of the side where the second inlet 22 is located, and a second connecting line connecting the lower end of the side where the first inlet 21 of the air supply conversion box 2 is located and the upper end of the side where the second inlet 22 is located, and the intersection line formed by the first connecting line and the second connecting line coincides with the center line of the valve leaf 32; when the valve leaf 32 swings to the first position, the air supply outlet 23 is connected to the first inlet 21, the upper side of the valve leaf 32 is close to the top of the side where the first inlet 21 of the air supply conversion box 2 is opened, and the lower side of the valve leaf 32 is close to the bottom of the side where the second inlet 22 of the air supply conversion box 2 is opened, at this time, the valve leaf 32 is blocked between the second inlet 22 and the air supply outlet 23; when the valve leaf 32 swings to the second position, the valve leaf 32 is blocked between the first inlet 21 and the air supply outlet 23 by analogy. The center line of the valve leaf 32 coincides with the center line of the air supply conversion box 2 , and the valve leaf 32 can accurately switch between the first inlet 21 and the second inlet 22 by simply rotating.

[0025] See also Figures 1 to 5Preferably, an X-shaped limit frame 24 is provided between two side surfaces of the air supply conversion box 2 adjacent to the first inlet 21, the second inlet 22 and the air supply port 23, and the X-shaped limit frame 24 is provided with baffles 25 on the upper and lower sides of the side surfaces where the first inlet 21 and the second inlet 22 are arranged near the air supply conversion box 2, and the baffles 25 are used to cooperate with the valve leaf 32 and the X-shaped limit frame 24 to seal and isolate the space inside the air supply conversion box 2. The X-shaped limit frame 24 plays a role in limiting and positioning to ensure that the air supply port 23 can be accurately connected to the first inlet or the second inlet; the valve leaf 32 rotates to the first position, and its upper side is close to the baffle 25 on the upper side of the first inlet 21, and the lower side is close to the baffle 25 on the lower side of the second inlet 22. At this time, the valve leaf 32 and the side of the X-shaped limit frame 24 parallel to the first connecting line are against each other, and cooperate with the baffle to completely separate the space above the valve leaf 32 and the space below the valve leaf 32 in the air supply conversion box 2. The valve leaf 32 completely cuts off the connection between the air supply port 23 and the second inlet 22 (such as Figure 3 , Figure 4 The first inlet 21 is cut off and so on (as shown); Figure 5 As shown). Gaskets can also be provided at the contact portions between the baffle 25 and the X-shaped limit frame 24 and the valve leaf 32 to achieve a better sealing effect. A clearance space is provided at the middle intersection of the X-shaped limit frame 24 to leave enough space for the rotation of the valve leaf 32.

[0026] See also Figures 1 to 4 Preferably, the plate heat exchanger 1 is provided with a dirty air box 4, and the dirty air box 4 is located at the dirty air inlet 12 of the second heat exchange channel. The dirty air box 4 is provided at the dirty air inlet 12 of the second heat exchange channel, so that there is a cavity from the dirty air inlet 12 to the heat exchanger body, which plays a role in buffering and stabilizing the flow, so that the airflow is more uniform when the incoming air passes through the heat exchanger port.

[0027] See also Figures 1 to 4 Preferably, the upper end surface of the dirty air inlet 12 is higher than the bottom surface of the dirty air box 4, and the dirty air box 4 is further provided with a drain port 41, the bottom end of the drain port 41 is lower than the upper end surface of the dirty air inlet 12, and the drain port 41 avoids the dirty air inlet 12. This can prevent the waste liquid from flowing back into the debinding furnace.

[0028] See also Figures 1 to 3 Preferably, the plate heat exchanger 1 is provided with a fresh air box 5, and the fresh air box 5 is located at the fresh air inlet 11 of the first heat exchange channel. The fresh air box 5 is provided at the fresh air inlet 11 of the first heat exchange channel, so that there is a cavity from the fresh air inlet 11 to the heat exchanger body, which plays a role of buffering and stabilizing flow, so that the airflow is more uniform when the incoming air passes through the heat exchanger port.

[0029] See also Figures 1 to 3Preferably, the plate heat exchanger 1 is provided with an exhaust box 6, and the exhaust box 6 is located at the dirty air outlet 13 of the second heat exchange channel. The exhaust box 6 is provided at the dirty air outlet 13 of the second heat exchange channel, so that there is a cavity between the dirty air that has exchanged heat and the space outside the plate heat exchanger, which plays a role in buffering and stabilizing the flow, so that the airflow is more uniform when the outlet air passes through the heat exchanger port.

[0030] See also Figures 1 to 3 Preferably, the plate heat exchanger can be a rectangular IZ counterflow plate heat exchanger 1 or a square heat exchanger, preferably a rectangular IZ counterflow plate heat exchanger 1, but it is not limited thereto and can also be other heat exchangers.

[0031] The utility model has the following working principle:

[0032] like Figure 3 , Figure 4 As shown, when the debinding furnace is working normally, the exhaust air enters the second heat exchange channel of the plate heat exchanger through the dirty air inlet of the device, and enters the exhaust duct in the factory through the dirty air outlet after heat exchange cooling or purification treatment before discharge; the clean cold air enters the first heat exchange channel of the plate heat exchanger through the cold air inlet and is preheated with the exhaust air of the second heat exchange channel for heat exchange; at this time, the valve leaf rotates to the first position under the drive of the driving motor (at this time, the valve leaf is blocked between the second inlet and the air supply port), and the fresh air preheated in the first heat exchange channel enters the heating box of the debinding furnace through the fresh air outlet, the first inlet of the air supply conversion box and the air supply port for heating (if there is no heat exchanger, the cold air directly enters the heating box, which requires a lot of energy consumption), so as to achieve the purpose of energy saving;

[0033] like Figure 5 As shown, after the drying is completed, the valve leaf in the air supply conversion box is driven by the driving motor to rotate to the second position (at this time the valve leaf is blocked between the first inlet and the air supply outlet), and the clean cold air (i.e., fresh air) does not pass through the plate heat exchanger for heat exchange and temperature rise, but directly enters the debinding furnace through the air supply yellowing box for rapid cooling.

[0034] Several points should be explained: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, and can be mechanical or electrical connections, or internal connectivity between two components, or direct connections. "Up", "down", "left", "right", etc. are only used to indicate relative position relationships. When the absolute position of the object being described changes, the relative position relationship may change.

[0035] Secondly: In the drawings of the embodiments disclosed in the present invention, only the structures related to the embodiments disclosed in the present invention are involved, and other structures can refer to the usual design. In the absence of conflict, the same embodiment and different embodiments of the present invention can be combined with each other.

[0036] Finally, the above is only a preferred implementation of the present utility model, and the protection scope of the present utility model is not limited to the above embodiments. All technical solutions under the concept of the present utility model belong to the protection scope of the present utility model.

[0037] It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications without departing from the principle of the utility model should also be regarded as within the protection scope of the utility model.

Claims

1. An energy-saving device for waste heat recovery of a binder removal furnace, comprising a plate heat exchanger, wherein the plate heat exchanger is provided with a first heat exchange channel and a second heat exchange channel which are independent of each other, and characterized in that: It also includes an air supply conversion box, the fresh air inlet of the first heat exchange channel is connected to the fresh air, the fresh air outlet of the first heat exchange channel is connected to the first inlet of the air supply conversion box, the air supply conversion box is also provided with a second inlet directly leading to fresh air, the air supply conversion box is provided with an air supply port, and the air supply conversion box is provided with a switching air valve; the switching air valve is used to switch the air supply port to be connected with the first inlet or with the second inlet, when the switching air valve moves to the first position, the air supply port is connected with the first inlet, and when the switching air valve moves to the second position, the air supply port is connected with the second inlet; the dirty air inlet of the second heat exchange channel is used to connect dirty air, and the dirty air outlet of the second heat exchange channel is used to discharge dirty air.

2. The energy-saving device for recovering waste heat from a debinding furnace according to claim 1, characterized in that: The switching air valve includes a driving member and a valve leaf, the valve leaf is rotatably arranged in the air supply conversion box, the first inlet is arranged on one side of the air supply conversion box, the second inlet is arranged on the side of the air supply conversion box opposite to the first inlet, the valve leaf is located between the first inlet and the second inlet, the driving member is transmission-connected to the valve leaf, and is used to drive the valve leaf to move to the first position or the second position, and the air supply port is arranged on the frame of the air supply conversion box adjacent to the first inlet and the second inlet.

3. The energy-saving device for recovering waste heat from a debinding furnace according to claim 2 is characterized in that: The valve leaf is rotatably arranged in the air supply conversion box, the driving member is a driving motor, and the output shaft of the driving motor is fixedly connected to the valve leaf for driving the valve leaf to rotate to the first position or the second position.

4. The energy-saving device for recovering waste heat from a debinding furnace according to claim 3 is characterized in that: The output shaft of the driving motor is fixedly connected to the position where the center line of the valve leaf is located, and the air supply outlet is arranged on the lower side of the air supply conversion box. A first connecting line connects the upper end of the side where the first inlet is located and the lower end of the side where the second inlet is located of the air supply conversion box, and a second connecting line connects the lower end of the side where the first inlet is located and the upper end of the side where the second inlet is located of the air supply conversion box. The intersection line formed by the first connecting line and the second connecting line coincides with the center line of the valve leaf.

5. The energy-saving device for recovering waste heat from a debinding furnace according to claim 4 is characterized in that: An X-shaped limit frame is provided between the two side surfaces of the air supply conversion box which are adjacent to the first inlet, the second inlet and the air supply outlet. The X-shaped limit frame is provided with baffles on the upper and lower sides of the side surfaces where the first inlet and the second inlet are arranged near the air supply conversion box. The baffles are used to cooperate with the valve leaf and the X-shaped limit frame to seal and isolate the space inside the air supply conversion box.

6. The energy-saving device for recovering waste heat from a debinding furnace according to claim 1, characterized in that: The plate heat exchanger is provided with a dirty air box, and the dirty air box is located at the dirty air inlet of the second heat exchange channel.

7. The energy-saving device for recovering waste heat from a debinding furnace according to claim 1, characterized in that: The upper end surface of the dirty air inlet is higher than the bottom surface of the dirty air box. The dirty air box is also provided with a drain port, the bottom end of the drain port is lower than the upper end surface of the dirty air inlet, and the drain port avoids the dirty air inlet.

8. The energy-saving device for recovering waste heat from a binder removal furnace according to claim 1, characterized in that: The plate heat exchanger is provided with a fresh air box, and the fresh air box is located at the fresh air inlet of the first heat exchange channel.

9. The energy-saving device for recovering waste heat from a debinding furnace according to claim 1, characterized in that: The plate heat exchanger is provided with an exhaust box, and the exhaust box is located at the dirty air outlet of the second heat exchange channel.

Images